Peter Dyneley

Narrator / Parisian Radio Operator (voice) (uncredited)

Ezra Meade

Commander Jenkins (uncredited)

Midger

Lloyd Greener

Jeff Tracy (voice)

Mr. Washington

Larry Stanford

Balkov

Regan (uncredited)

Willy Reichel

Jeff Tracy (voice)

Miller

Escalus, Prince of Verona

Lord St Erth

Dr. Rene Normand

Tony Roscoe

German Officer #1

Captain

Lady Anthea's Husband (uncredited)

Dr. Morrow

Tom

Jeff Tracy / Commander Norman / Interceptor One Pilot (voice)

Arthur Hayes

Mark Lemming

Robert Hathaway

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David Garrick

Jeff Tracy / Professor Heinz Bodman (voice)

The Investigator (voice)

Col. Golchenko

Uncle George

Jeff Tracy (voice)

Paul Verrier

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Lord St. Erth

Hadley

LeRoy

Len Hickman

Lord Alistair Abdington

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Baron Mauray

Pat Tarley

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Red Darrow

Commander Charles Hastings

Jeff Tracy (voice)

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Commander Charles Hastings

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Von Bulow